JEE Main & Advanced Chemistry Alcohols, Phenols and Ethers / एल्कोहॉल, फीनॉल तथा ईथर Question Bank Properties of alcohol Phenol and Ethers

  • question_answer
    Primary and secondary alcohols on action of reduced copper give             [CPMT 1982; MP PMT 1985; EAMCET 1987, 93; MP PET 1995]

    A)                 Aldehydes and ketones respectively

    B)                 Ketones and aldehydes respectively

    C)                 Only aldehydes

    D)                 Only ketones

    Correct Answer: A

    Solution :

               \[\underset{{{1}^{o}}\text{alcohol}}{\mathop{R\text{-}C{{H}_{2}}OH}}\,\xrightarrow{Cu}R-CHO+{{H}_{2}}\]                                 \[\underset{{{2}^{o}}\text{alcohol}}{\mathop{R-\underset{OH}{\mathop{\underset{|\,\,\,\,}{\mathop{CH}}\,}}\,-R}}\,\xrightarrow{Cu}R-\underset{O}{\mathop{\underset{||}{\mathop{C}}\,}}\,-R+{{H}_{2}}\]


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